US3935797A - Wear and seizure resistant aluminum alloy piston - Google Patents

Wear and seizure resistant aluminum alloy piston Download PDF

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Publication number
US3935797A
US3935797A US05/413,821 US41382173A US3935797A US 3935797 A US3935797 A US 3935797A US 41382173 A US41382173 A US 41382173A US 3935797 A US3935797 A US 3935797A
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US
United States
Prior art keywords
piston
iron
wear
aluminum alloy
coated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US05/413,821
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English (en)
Inventor
Itaru Niimi
Yasuhisa Kaneko
Yoshiro Komiyama
Masaaki Tokui
Katsumi Kondo
Akio Kouno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Jidosha Kogyo KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Toyota Jidosha Kogyo KK filed Critical Toyota Jidosha Kogyo KK
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Publication of US3935797A publication Critical patent/US3935797A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/10—Pistons  having surface coverings
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • C23C4/067—Metallic material containing free particles of non-metal elements, e.g. carbon, silicon, boron, phosphorus or arsenic
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/18—After-treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J1/00—Pistons; Trunk pistons; Plungers
    • F16J1/02—Bearing surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/02—Light metals
    • F05C2201/021—Aluminium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2201/00—Metals
    • F05C2201/04—Heavy metals
    • F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
    • F05C2201/0436—Iron
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2203/00—Non-metallic inorganic materials
    • F05C2203/08—Ceramics; Oxides
    • F05C2203/0804—Non-oxide ceramics
    • F05C2203/0808—Carbon, e.g. graphite
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S384/00—Bearings
    • Y10S384/90—Cooling or heating
    • Y10S384/913—Metallic compounds

Definitions

  • the object of the present invention is to improve the resistance to wear and seizure of an aluminum alloy piston of an internal combustion engine by coating the vulnerable part of the piston with iron and at the same time reducing the engine weight.
  • FIGS. 1 and 2 respectively show the skirt of an aluminum alloy piston and its vulnerable part which is to be coated to improve its wear resistance.
  • FIG. 3 is a micrograph showing a section of the part of the piston which has been coated with iron according to the present invention, enlarged 200 times.
  • FIG. 4 is a micrograph showing the iron-coated surface of a piston of this invention, enlarged 100 times.
  • FIG. 5 is a micrograph showing the surface of a piston which has been first coated with iron and then coated with a film of manganese phosphate, enlarged 100 times.
  • FIG. 6 is a photograph showing an iron-metallized aluminum alloy piston and an aluminum cylinder liner after 100 hours of testing on a stand.
  • FIG. 7 shows an aluminum alloy piston according to our invention which has been coated with iron and in which a groove has been provided in the piston skirt area to be metallized.
  • the part of the aluminum alloy piston which is liable to heavy wear can be successfully made wear and seizure resistant by being coated with iron, while the aluminum cylinder liner is left unchanged.
  • this invention is applicable to an assembly comprising a cast iron cylinder liner and an aluminum alloy piston.
  • the grid on FIG. 1 shows the area 1 on the skirt of an aluminum alloy piston which is to be coated with iron.
  • the grid on FIG. 2 shows the area 1 on the skirt of an aluminum alloy piston which is to be coated when the coating is limited in its application.
  • said area on the piston skirt is coated with iron as follows: A piston which has first been reduced in its diameter by the thickness of the coating to be applied is washed with "Triclene” (trichloroethylene) and fully dried. The area to be coated is then blasted with silica sand and thereafter coated with a powder composed of 0.3% carbon, with the balance substantially all iron, using the plasma spray method, followed by grinding to a finish.
  • Tericlene trichloroethylene
  • the iron in the powder of course contains some impurities.
  • FIG. 3 is a micrograph showing a section of the coated area of FIG. 1 after it has been ground to a finish.
  • FIG. 4 is a similar micrograph which shows the surface of the metallized area, over which iron and carbon (looking gray) and blowholes (looking black) are scattered.
  • FIG. 5 is a micrograph of the coated surface after it has been subsequently coated with a film of manganese phosphate.
  • the black part corresponds to blowholes, the white part to the sprayed iron, and the gray part to the film of manganese phosphate.
  • FIG. 6 shows an aluminum alloy piston coated in accordance with the invention and an aluminum cylinder liner after 100 hours of testing on a stand, wherein no scratch is apparent thus exemplifying the wear and seizure resistance of the piston.
  • FIG. 7 illustrates an iron-coated piston with a groove 2 provided therein to improve the oil collection.
  • the overall effect of iron-coating the surface whereby the iron improves the wear resistance, the carbon improves lubrication, and scattered blowholes result from spraying, is to impart wear and seizure resistance to the aluminum alloy piston according to the invention.
  • the aluminum alloy piston which has been surface-treated according to the present invention as compared with a conventionally plated piston, can be produced at less cost and displays a resistance to wear and seizure which cannot be expected from a conventional piston, as a consequence of carbon lubrication, the wear resistant iron, and the spray blowholes and manganese phosphate film which collect the oil.
  • the use of an aluminum liner reduces the engine weight.
  • the coating according to the present invention is done by the plasma spraying method, whereby the metal powder, which is introduced in a plasma jet stream, is melted and sprayed by inertia on to the surface to be coated.
  • the metal powder is carried into the plasma jet stream on an inert gas flowing through a vibrated pipe (diameter 60-80mm).
  • the optimum grain size of the Fe-C powder used is 200-300 mesh. A grain size of less than 200 mesh would make it hard to transport the powder evenly on the inert gas, resulting in an uneven metallized surface, or in a failure of the powder to be deposited successfully on the surface to be coated, for the powder passes unmolten through the plasma jet stream.
  • the recommended thickness of the applied layer is 0.4-0.7mm.
  • the present accuracy of grinding is about 0.2mm. Therefore the applied layer, when it is less than 0.4mm thick will become undesirably thin if it is ground down more than 0.2mm.
  • the coating when the coating is more than 0.7mm thick, the deposited powder will become excessively thick and the coating will be liable to separate from the substrate in use. This will also involve a wasteful consumption of material.
  • the lower limit of the thickness of deposited layer is set by the machining accuracy, while its upper limit is set by the danger of separation of the layer and the yield of material deposited.
  • a piston the diameter of which had been reduced by twice the coating thickness, i.e., 0.5mm (0.25 ⁇ 2) was washed with trichloroethylene and fully dried. Then the area to be coated was blasted with silica sand 0.2-0.5mm in diameter, and then coated with a material consisting essentially of 0.3% carbon and the balance substantially all iron, to a thickness of 0.4-0.5mm by the plasma spraying method. Thereafter the piston was ground to a finish and subjected to an engine stand test.
  • a V-8 engine, cylinder bore 78mm, having a stroke of 78mm with a total displacement of 2,981cc equipped with an aluminum cylinder liner (made of a material consisting essentially of Si 17%, Cu 4.5%, Fe 1.0%, Mg 0.5%, Zn less than 0.1%, the balance being aluminum) and an iron-coated piston according to the present invention was put through a break-in test and then an endurance test on the engine stand in accordance with the JISD 1003 loading test.
  • the endurance test conditions were: 4500 rpm at full load and full throttle; cooling water temperature 80°C and lubricant temperature 120°C.
  • the wear of the piston and cylinder liner were measured in terms of piston diameter and liner bore before and after testing.
  • a piston the diameter of which had first been reduced by 0.35mm, i.e., the coating thickness, was gas-sprayed with molybdenum to a thickness of 0.05-0.1mm and then gas-sprayed with a steel wire comprising 0.5-0.8% carbon.
  • Example 1 Stand test of a coated piston working in an aluminum cylinder liner was carried out in the same way as in Example 1. According to the results thereof, the wear of the aluminum cylinder liner was greater than in Example 1.
  • Example 1 The excellent resistance to wear observed in Example 1 may be attributed to the following facts:
  • the surface of metallized layer is full of blowholes which collect the oil.
  • the iron-coated piston of Example 1 was subjected to a manganese phosphate treatment (by immersing it for 15 minutes at 100°C in 140 g/l of Parkolubrite-IA (manufactured by the Japan Parkerizing Co.), followed by washing with hot water at 30°-40°C) and then to the same stand test as in Example 1.
  • the test results were somewhat better than those of Example 1, the wear of the piston being 20-25 ⁇ and that of the liner 5-10 ⁇ .
  • Parkolubrite-IA used in this Example comprises 1.2-1.6 g/l of manganese, 2.5-3.5 g/l of iron and 14.5-15.5 g/l of phosphoric ion.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Coating By Spraying Or Casting (AREA)
US05/413,821 1973-01-09 1973-11-08 Wear and seizure resistant aluminum alloy piston Expired - Lifetime US3935797A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JA48-5457 1973-01-09
JP545773A JPS5432421B2 (enrdf_load_stackoverflow) 1973-01-09 1973-01-09

Publications (1)

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JP (1) JPS5432421B2 (enrdf_load_stackoverflow)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5014605A (en) * 1990-02-21 1991-05-14 Briggs & Stratton Corporation Magnesium piston coated with a fuel ingition products adhesive
US5129378A (en) * 1991-09-27 1992-07-14 Brunswick Corporation Two-cycle marine engine having aluminum-silicon alloy block and iron plated pistons
WO1994012783A1 (de) * 1992-11-28 1994-06-09 Mahle Gmbh Kolben-zylinder-vorrichtung eines verbrennungsmotors
US5352541A (en) * 1990-08-31 1994-10-04 Daido Metal Company Ltd. Sliding member made of aluminum bearing alloy having excellent anti-seizure property
US5356277A (en) * 1992-02-12 1994-10-18 Seiko Seiki Kabushiki Kaisha Vane type gas compressor
WO1995002024A1 (en) * 1993-07-06 1995-01-19 Ford Motor Company Limited Solid lubricant and hardenable steel coating system
US5592927A (en) * 1995-10-06 1997-01-14 Ford Motor Company Method of depositing and using a composite coating on light metal substrates
US5766693A (en) * 1995-10-06 1998-06-16 Ford Global Technologies, Inc. Method of depositing composite metal coatings containing low friction oxides
US6357340B1 (en) * 1999-02-26 2002-03-19 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Piston compressor piston
US6548195B1 (en) * 1999-01-19 2003-04-15 Sulzer Metco Ag Coating for the working surface of the cylinders of combustion engines and a method of applying such a coating
US6557457B1 (en) 1999-12-01 2003-05-06 Federal-Mogul World Wide, Inc. Bushingless piston and connecting rod assembly and method of manufacture
US20040261751A1 (en) * 2003-06-26 2004-12-30 Wolfgang Rein Piston and connecting rod assembly having phosphatized bushingless connecting rod and profiled piston pin
US20050087166A1 (en) * 2003-10-23 2005-04-28 Wolfgang Rein Piston having a patterned coating and method of applying same
US20050218183A1 (en) * 2004-04-02 2005-10-06 Alan Berry Driver configuration for a power tool
US20060000351A1 (en) * 2004-06-30 2006-01-05 Schenkel Jerry L Piston for an engine
US20060101939A1 (en) * 2004-11-16 2006-05-18 Mcewan Alan S Connecting rod assembly for an internal combustion engine and method of manufacturing same
US20060101642A1 (en) * 2004-11-16 2006-05-18 Mcewan Alan S Method of manufacturing a connecting rod assembly for an internal combustion engine
US8613137B2 (en) 2004-11-16 2013-12-24 Mahle International Gmbh Connecting rod lubrication recess
US20170284544A1 (en) * 2016-03-30 2017-10-05 Electro-Motive Diesel, Inc. Piston with variable depth groove root
WO2018153410A1 (de) * 2017-02-24 2018-08-30 Sls Technologies Gmbh Verfahren zum herstellen eines arbeitskolben
CN108825779A (zh) * 2018-06-26 2018-11-16 余泽军 一种o型密封圈
CN108825840A (zh) * 2018-06-26 2018-11-16 余泽军 一种测量用管路截止阀的防腐密封工艺

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52113415A (en) * 1976-03-19 1977-09-22 Kyoritsu Kk Combination of cylinder and piston in sliding relationship
JPS6023671A (ja) * 1983-07-19 1985-02-06 Kayaba Ind Co Ltd 油圧緩衝器のピストンロツド
JPS6290960U (enrdf_load_stackoverflow) * 1985-11-28 1987-06-10

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1441468A (en) * 1918-08-12 1923-01-09 Wills Child Harold Composite metal structure for internal-combustion engines and method of forming the same
US3077659A (en) * 1958-12-24 1963-02-19 Gen Motors Corp Coated aluminum cylinder wall and a method of making
US3405610A (en) * 1965-07-14 1968-10-15 Wellworthy Ltd Piston having spray coated inlay

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1441468A (en) * 1918-08-12 1923-01-09 Wills Child Harold Composite metal structure for internal-combustion engines and method of forming the same
US3077659A (en) * 1958-12-24 1963-02-19 Gen Motors Corp Coated aluminum cylinder wall and a method of making
US3405610A (en) * 1965-07-14 1968-10-15 Wellworthy Ltd Piston having spray coated inlay

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5014605A (en) * 1990-02-21 1991-05-14 Briggs & Stratton Corporation Magnesium piston coated with a fuel ingition products adhesive
US5352541A (en) * 1990-08-31 1994-10-04 Daido Metal Company Ltd. Sliding member made of aluminum bearing alloy having excellent anti-seizure property
US5129378A (en) * 1991-09-27 1992-07-14 Brunswick Corporation Two-cycle marine engine having aluminum-silicon alloy block and iron plated pistons
US5356277A (en) * 1992-02-12 1994-10-18 Seiko Seiki Kabushiki Kaisha Vane type gas compressor
WO1994012783A1 (de) * 1992-11-28 1994-06-09 Mahle Gmbh Kolben-zylinder-vorrichtung eines verbrennungsmotors
US5560283A (en) * 1992-11-28 1996-10-01 Mahle Gmbh Piston-Cylinder assembly of an internal combustion engine
WO1995002024A1 (en) * 1993-07-06 1995-01-19 Ford Motor Company Limited Solid lubricant and hardenable steel coating system
US5766693A (en) * 1995-10-06 1998-06-16 Ford Global Technologies, Inc. Method of depositing composite metal coatings containing low friction oxides
DE19637737A1 (de) * 1995-10-06 1997-04-10 Ford Werke Ag Verfahren zur Abscheidung einer Eisenoxid-haltigen Beschichtung auf ein Leichtmetallsubstrat
GB2305939A (en) * 1995-10-06 1997-04-23 Ford Motor Co Thermally depositing a composite coating based on iron oxide
US5592927A (en) * 1995-10-06 1997-01-14 Ford Motor Company Method of depositing and using a composite coating on light metal substrates
DE19637737C2 (de) * 1995-10-06 1999-04-15 Ford Werke Ag Verfahren zur Abscheidung einer Eisenoxid-haltigen Beschichtung auf ein Leichtmetallsubstrat
GB2305939B (en) * 1995-10-06 1999-05-26 Ford Motor Co Thermally depositing a composite coating on a substrate
US6548195B1 (en) * 1999-01-19 2003-04-15 Sulzer Metco Ag Coating for the working surface of the cylinders of combustion engines and a method of applying such a coating
US6572931B2 (en) 1999-01-19 2003-06-03 Sulzer Metco Ag Method of applying a ferrous coating to a substrate serving as a cylinder working surface of a combustion engine block
US6357340B1 (en) * 1999-02-26 2002-03-19 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Piston compressor piston
US6557457B1 (en) 1999-12-01 2003-05-06 Federal-Mogul World Wide, Inc. Bushingless piston and connecting rod assembly and method of manufacture
US20040261751A1 (en) * 2003-06-26 2004-12-30 Wolfgang Rein Piston and connecting rod assembly having phosphatized bushingless connecting rod and profiled piston pin
US6923153B2 (en) 2003-06-26 2005-08-02 Mahle Technology, Inc. Piston and connecting rod assembly having phosphatized bushingless connecting rod and profiled piston pin
US20050087166A1 (en) * 2003-10-23 2005-04-28 Wolfgang Rein Piston having a patterned coating and method of applying same
US7171936B2 (en) 2003-10-23 2007-02-06 Mahle Technology, Inc. Piston having a patterned coating and method of applying same
CN100504057C (zh) * 2003-10-23 2009-06-24 玛勒技术有限公司 具有图纹涂层的活塞以及涂覆该涂层的方法
US20050218183A1 (en) * 2004-04-02 2005-10-06 Alan Berry Driver configuration for a power tool
WO2005097420A3 (en) * 2004-04-02 2006-06-22 Black & Decker Inc Driver configuration for a power tool
US7789169B2 (en) * 2004-04-02 2010-09-07 Black & Decker Inc. Driver configuration for a power tool
US20060000351A1 (en) * 2004-06-30 2006-01-05 Schenkel Jerry L Piston for an engine
US7051645B2 (en) * 2004-06-30 2006-05-30 Briggs & Stratton Corporation Piston for an engine
US20080115621A1 (en) * 2004-11-16 2008-05-22 Mcewan Alan S Connecting rod assembly for an internal combustion engine
US8484844B2 (en) 2004-11-16 2013-07-16 Mahle Industries, Incorporated Method of manufacturing a connecting rod assembly for an internal combustion engine
US20060101642A1 (en) * 2004-11-16 2006-05-18 Mcewan Alan S Method of manufacturing a connecting rod assembly for an internal combustion engine
US7581315B2 (en) 2004-11-16 2009-09-01 Mahle Technology, Inc. Connecting rod assembly for an internal combustion engine and method of manufacturing same
US20060101939A1 (en) * 2004-11-16 2006-05-18 Mcewan Alan S Connecting rod assembly for an internal combustion engine and method of manufacturing same
US7810411B2 (en) 2004-11-16 2010-10-12 Mahle Technology, Inc. Connecting rod assembly for an internal combustion engine
US8079145B2 (en) 2004-11-16 2011-12-20 Mahle Technology, Inc. Method of manufacturing a connecting rod assembly for an internal combustion engine
US7516546B2 (en) 2004-11-16 2009-04-14 Mahle Technology, Inc. Method of manufacturing a connecting rod assembly for an internal combustion engine
US8613137B2 (en) 2004-11-16 2013-12-24 Mahle International Gmbh Connecting rod lubrication recess
US20170284544A1 (en) * 2016-03-30 2017-10-05 Electro-Motive Diesel, Inc. Piston with variable depth groove root
WO2018153410A1 (de) * 2017-02-24 2018-08-30 Sls Technologies Gmbh Verfahren zum herstellen eines arbeitskolben
CN108825779A (zh) * 2018-06-26 2018-11-16 余泽军 一种o型密封圈
CN108825840A (zh) * 2018-06-26 2018-11-16 余泽军 一种测量用管路截止阀的防腐密封工艺
CN108825779B (zh) * 2018-06-26 2020-04-24 无锡双羊暖通设备有限公司 一种o型密封圈
CN108825840B (zh) * 2018-06-26 2020-07-31 铜陵市兆林工贸有限责任公司 一种测量用管路截止阀的防腐密封工艺

Also Published As

Publication number Publication date
JPS5432421B2 (enrdf_load_stackoverflow) 1979-10-15
JPS4992454A (enrdf_load_stackoverflow) 1974-09-03

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